Polar CS300 User Manual
36
Extra User Settings
The cycling computer uses HR
max
, HR
sit
and VO
2max
values for estimating your energy expenditure.
Note: Default values of HR
max
, HR
sit
and VO
2max
based on your age may be used when no other accurate values are available.
1. HR
max
(Maximum heart rate)
HR
max
is the highest number of heartbeats per minute during maximum physical exertion. HR
max
is used to determine exercise intensity.
HR
max
may vary to some extent according to sport genre, for example running HR
max
> cycling HR
max
> swimming HR
max
.
The most accurate method for determining individual HR
max
is to perform a maximal exercise stress test in a laboratory. HR
max
can also
be deduced from the HR
max
-p score given by the Polar Fitness Test. Or, calculate an estimate of HR
max
with the age-based formula
‘220 minus age’.
2. HR
sit
(Heart rate value in a sitting position)
HR
sit
is your typical heart rate when you are not doing any physical activity (while sitting). To easily determine HR
sit
, wear your transmitter,
sit down and do not engage in any physical activity. After two or three minutes, press
OK in Time mode to view your heart rate. This is your
HR
sit
. For a more precise measurement, repeat the procedure several times and calculate your average.
3. VO
2max
(Maximal oxygen uptake)
VO
2max
is your body’s maximum capacity for oxygen consumption during maximum exertion. The most accurate way of determining VO
2max
is to perform a maximal stress test in a laboratory.
If you know your exact clinically tested VO
2max
, select the value from the scroll list. Otherwise, measure a comparable value, OwnIndex,
by taking the Polar Fitness Test. For further instructions, see chapter 4.3 Polar Fitness Test.